Apparatus for purifying waste water.



E. MANN & J. HEESS.

APPARATUS FOR PURIFYING WASTE WATER.

APPLICATION FILED NOV. 6, 1913.

1,095,409, A I PatentedMay5,114.

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E. MANN & J. HEESS. APPARATUS FOR. PURIFYING WASTE WATER.

APPLICATION IILBD NOV. 6, 1913.

1,095,409, Patented May 5 1914.

QSIIEETS-SHEET 2.

coLunBlA PLANOGRAPH 00., WASHINGTON, n. 94.

EDUARD MANN AND JACOB HEESS, OF EBERTSHEIM, GERMANY.

APPARATUS FOR PURIFYING WASTE WATER.

Specification of Letters Patent. Application filed November 6, 1913.

Patented May 5, 1914. Serial No. 799,554.

T all whom it may concern:

Be it known that we, EDUARD MANN and Jacon Hnnss, subjects of the Kingof Bavaria, and residentat Ebertsheim, Palatinate of the Rhine, GermanEmpire, have invented certain new and useful Apparatus for Purifyingaste ater, of which the following is a specification.

The invention relates to an apparatus of the nature of a screeningapparatus for purifying and cleaning the outfall water in paper andcellulose works for the purpose of recovering the paper material andother ingredients still contained in the water (filaments, china-clay,glue, color, etc); it may also find application in similar industries,for instance, for the removal of the impurities from drinking water andother liquids. The new apparatus is so constructed that it meets thevarious requirements for purifying these mixtures, and consequentlysecures a complete separation of the materlals which can be used overagain and of the impurities from the residual water and thus a completeclarification of the water is obtained.

The drawing illustrates the new apparatus 5 Figure 1, being alongitudinal section. Fig. 2 is a plan vie Fig. 3 is a front elevation.Fig. 4:, is a slightly modified form of the device,-in side elevation,and Fig. 5 is an end view of the form shown in Fig. 4.

The new apparatusis composed according to this invention of tworeceptacles a and I) placed in connection one with the other at thelower part, through which the liquid to be treated flows successively.The first receptacle afor't-he liquid in which the impurities sink andseparate into light and heavy mixtures, (for which reason the receptacle is described as the precipitating receptacle) possesses aconsiderable length and a front wall i sloping gently toward thepartition, while a rear wall f sloping toward the inlet (Z is soarranged that the fiocculent particles rising upward after they arecombined together are deposited upon the surface 2' and unite with theparticles which have sunk to the bottom by their own gravity, while theair and the fatty bodies with other light impurities rise to thesurface. The precipitated materials can be removed in the well knownmanner from the deepest partof the receptacle, while the liquid risesunderneath the lower end of the partition f into the second receptacle6, which receptacle widens out upward in the form of a the waters beforetheir funnel. The clarified water can be removed from the top of thissecond receptacle 6, known as the rising or clarifying receptacle, andat about the middle height thereof according to requirement, specialtaps may be inserted for the removal of the partially clarified liquid.For the precipitation of the materials contained in the liquid, theremay also, as far as necessary, be used any of the well knownprecipitants (sulfate of alumina, alum, raw sulfate, and so forth)which, however, in the present instance are mixed with entry into thereceptacle and also in the suction pump well.

The waste waters proceeding from the paper machine flow through the tube(Z at 9 into the receptacle (4. By means of the slide-plate 7a,adjustable in the vertical direction, there is separated off beneath theinflow (Z in the space a a front chamber 9 which may be regarded as asettling and distributing space. The slide-plate it leaves freeunderneath it a relatively narrow space through which the water flowsout of the space g in a broad thin, uniform stream toward the rear flatbottom surface a. The partition 7 may be fixed or may be so adjusteddirectly by hand or by means of a mechanism a so that an openingadjusted according to the requirement of the special circumstances,joins underneath this partition the receptacles a and 6 together.

At the lowermost point of the apparatus is fixed the outlet 0 andmoreover, there are provided in case of need at several points ofdifferent heights, the outlet taps c 0 for the precipitating material.At a still greater height is placed an outlet Z for a portion of the notyet fully clarified water which can be used for filling the pulp-enginesand so forth. At the edge of the container 6 are arranged overflowspouts e which discharge into the drain m. At the'highest point of thereceptacle (4 are arranged at a few centimeters above the water levelthe side outlets 70 which serve for the continuous or intermittentremoval of the separated fatty and other like materials and especiallyof the foam. The lower edge of these outlets is placed a little abovethe highest water level so that here only the foam is discharged into apit or the like. On the flowing down of the water beneath the battleplate it in a quiet, broad, and thin stream, the heavy particles aredeposited upon the surface z'. Also the. particles and lumps which firstrise and then, after collecting together, sink down, are precipitatedupon the sloping surface 2', after they have by coagulation lost theirbuoyancy. The substances deposited upon the surface 2' are carried bythe water-flow undisturbed and without any danger of escape to theoutlet laps c 0, c, from which place they can be brought back again,according to need, to the paper machine, and so on. By the arrangementthat beneath the partition there takes place a sharp alteration ofdirection ith sin'iultancous considerably diminishing speed, thefilan'ients, etc, still remaining in the water do not follow the currentupward, but are led toward the outlet tap 0 and partly toward the taps cand 0 The separation of these particles is also facilitated by thesuction effect of the water flowing ofl through the tap and also throughthe taps c and c. The clarified water rises gradually in the receptacleI) up the smooth walled surfaces and can be let off through the outlet Zas far as is necessary for the filling of pulp-engines or for otherpurposes. The thus occasioned lowering of the water level, consequentlyalso the alteration of the quantity of material flowing back to thepaper machine and so on, is in consequence of the proportion to thecontents of the great surfaces of the receptacle, so small, that by thetrifling alteration in the height of the water level, no unfavorableaction on the working of the paper machine with re gard to the weight ofthe paper can be produced, The water flowing over the rim 6 can beallowed to flow off, or it may also, if necessary, be utilized for otherpurposes, for instance for filling the rag-boilers, suctionboxes and soon, because this water is completely free from foam. The fatty bodies,rising in the receptacle (4, are collected there with certainty by meansof the partition f. N ither can they come to the outflow through thetaps c c 0 nor into the clarified water flowing away above in thereceptacle .7). They pass together with the air, which is present, intothe receptacle (1 at the surface and can there be discharged through thechannel or when the apparatus is emptied, they may be run into a specialpit or the like. The partition f can be so arranged that it can beentirely or partially withdrawn according to circumstances, whereby thedevice is rendered accessiblc in all its parts and can be easilycleaned. The cleaning can also be performed easily in a few minuteswithout withdrawal of the partition, by use of a hose.

In the construction of the new apparatus it has been rendered impossibleby many simple means, that on one hand any valuable particles shouldflow off, and on the other hand, that unsuitable material and air or thelike should be mixed with them or that any fibrous or serviceableparticles should fiow away with the clarified waste water. The mechanismcan moreover be used both for continuous and also for temporary removalof concentrated fluid. When the reusing of the concentrated fluid is notin question, then by aid of this construction, a considerableconcentration can be attained and thereby the quantity of the residueswhich have to be further reated, is considerably reduced. Forperiodical. use the partition f can be adjusted according to the heightof material, which collects between two removals. The material is thendeposited at the lowest point of the receptacle. The number of theoutlet taps depends on the circumstances. In general, the separation ofthe floating particles is aided by the arrangement of several taps whichcan be used at the same time. The above described installation can alsobe altered in such a manner, that the waste water flows from beneathinto the clarifying tank through a pipe widening gradually up to theentire width of the clarifying receptacle. By these means there isattained, that the formation of foam is almost entirely avoided. Vvateris forced in from below through the supply pipe 79 into the inlet cl,which gradually widens to the entire width of the receptacle, and passesfrom thence into the first space g and then into the receptacle c.

Having now described the invention, what we claim is 1. Apparatus forpurifying the waste water from paper, cellulose and similar industries,comprising a front and a rear container connected at their lower parts,an adjustable sloping partition between said containers, a transversebaffle plate near the inlet of said front container, and outlets in therear container, the lower wall of said front contain or being disposedat a lower an gle than the lower wall of the rear container.

2. Apparatus for purifying the waste water from paper, cellulose andsimilar industries, comprising a front and a rear container connectedtogether at their lower parts, an adjustable inclined partition betweensaid containers, a transverse bafile plate near the inlet of said frontcontainer,

lateral overflow channels at the upper sides of said front container,said front container having higher walls than the rear containers, and aplurality of outlets in said rear container, as specified.

3. Apparatus for purifying waste water from paper mills and similarindustries, comprising a front and a rear container, con nected at theirlower parts, an adjustable sloping partition between said containers, atransverse baffle plate near the inlet of said front container, lateraloverflow channels at the upper edges of said rear container, as hereinset forth.

4. Apparatus for purifying Waste Water from paper mills and similarindustries, comprising a front and a rear container connected at theirlower parts, an adjustable sloping partition, between said containers, atransverse baffle plate near the inlet of said front container, lateraloverflow channels at the upper sides of said front container, said frontcontainer having higher Walls than the rear container and a plurality ofvalve controlled outlets at different elevations through the inclinedrear end of said rear container,

the lower Walls of the containers and the partition Wall sloping towardthe deepest part of the rear container.

In testimony, whereof, We have signed our names to this specification inthe presence of two subscribing Witnesses.

EDUARD MANN. JACOB HEESS.

Witnesses S. S. BERGH, CH. SOHMITT.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

